All cars will creep forward with the first gear on. The thing is, if you're already going faster than 10km/h, they'll decelerate towards that surprisingly quickly.

Yea, this is sorta true. If you leave a manual transmission car in gear then the momentum of the pistons, and the minimal gas it's fed to prevent stalling in neutral, will give a very slight push at sufficiently slow speeds. It's much smaller than the effect you get from an automatic, though, where the gas delivered to the engine is enough to keep it from stalling even when shifting to drive from a dead standstill.

Mostly I'm thinking of the situation where you break to a stop. In a manual, you have pushed in the clutch so the wheels are completely disconnected from the engine, giving zero creep when you release the brake, whereas in an automatic the car will start to creep.